Abstract
It has been a challenge to design an optical see-through head-mounted display (OST-HMD) that has a wide field of view (FOV) and low f-number (f/#) while maintaining a compact, lightweight, and non intrusive form factor. In this paper, we present an OST-HMD design using a wedge-shaped freeform prism cemented with a freeform lens. The prism, consisting of three freeform surfaces (FFSs), serves as the near-eye viewing optics that magnifies the image displayed through a microdisplay, and the freeform lens is an auxiliary element attached to the prism in order to maintain a nondistorted see-through view of a real-world scene. Both the freeform prism and the lens utilize plastic materials to achieve light weight. The overall dimension of the optical system per eye is no larger than by by , and the weight is . Based on a 0.61 in. microdisplay, our system demonstrates a diagonal FOV of and an f/# of 1.875, with an exit pupil diameter and an eye relief.
© 2009 Optical Society of America
Full Article | PDF ArticleMore Like This
Qingfeng Wang, Dewen Cheng, Yongtian Wang, Hong Hua, and Guofan Jin
Appl. Opt. 52(7) C88-C99 (2013)
Dewen Cheng, Hailong Chen, Cheng Yao, Qichao Hou, Weihong Hou, Li Wei, Tong Yang, and Yongtian Wang
Opt. Express 30(20) 36931-36948 (2022)
Dewen Cheng, Jiaxi Duan, Hailong Chen, He Wang, Danyang Li, Qiwei Wang, Qichao Hou, Tong Yang, Weihong Hou, Donghua Wang, Xiaoyu Chi, Bin Jiang, and Yongtian Wang
Photon. Res. 10(1) 21-32 (2022)